MAMAC SYSTEMS PR-276 Manual

Accuracy*: ± 1% FS
Overpressure: 10 PSID
Supply Voltage: 12–40 VDC
12–35 VAC (VDC output units only)
Supply Current: VDC Units – 10 mAmax.
mAUnits – 20 mAmax.
Enclosure: 18 Ga C. R. Steel NEMA4 (IP-65)
6061T aluminum probe
Finish: Baked on enamel – PMS2GR88B
Conformance: EMC Standards EN50082-1(1992)
EN55014(1993)/EN60730-1(1992)
Compensated Temp Range: 25°F to 150°F (-4°C to 65°C)
T. C. Error: ±0.0125%/°F (.02%/°C)
Operating Temp Range: 0°F to 175°F (-18°C to 80°C)
Media Compatibility: Clean dry air or any inert gas
Environmental: 10–90%RH Non-Condensing
Termination: Unpluggable screw terminal block
Wire Size: 12 Ga max.
Load Impedance: 1.6K ohms max. at 40 VDC (mA
output units)
1K ohms min. (VDC output units)
Weight: Enclosure 1.0 lbs. (.45 kg)
*Includes non-linearity, hysteresis and non-repeatability
RANGE OUTPUT
SPECIFICATIONS
Inspection
Requirements
Mounting
R10 ("wc)
R11 ("wc)
R12 (pa)
R13 (pa)
0 TO 5.0 / 0 TO 2.5 / 0 TO 1.25
0 TO 15.0 / 0 TO 7.5 / 0 TO 3.75
0 TO 1250 / 0 TO 625 / 0 TO 312.5
0 TO 3750 / 0 TO 1875 / 0 TO 937.5
(4–20 mA 2-wire)
(0–5 VDC/0–10 VDC
field selectable)
mA
VDC
For Additional Information See PR-276 Data Sheet
INSTALLATION
8189 Century Boulevard • Minneapolis, MN 55317-8002 • USA
800-843-5116 • 952-556-4900 • Fax [phone]
[email protected] • www.mamacsys.com
Model PR-276
Technical Information
TI.276-03
DUCT PRESSURE TRANSDUCER
Inspect the package for damage. If damaged, notify the
appropriate carrier immediately. If undamaged, open the
package and inspect the device for obvious damage.
Return damaged products.
Warning:
• Do not use on oxygen service, in an explosive/hazardous
environment, or with flammable/combustible media.
•Disconnect power supply before installation to prevent
electrical shock and equipment damage.
•Make all connections in accordance with the job wiring
diagram and in accordance with national and local
electrical codes. Use copper conductors only.
Caution:
•Use electrostatic discharge precautions (e.g., use of wrist
straps) during installation and wiring to prevent equipment
damage.
•Avoid locations where severe shock or vibration, excessive
moisture or corrosive fumes are present. NEMAType 4
housings are intended for outdoor use primarily to provide
a degree of protection against wind-blown dust, rain, and
hose-directed water.
•Do not exceed ratings of the device.
Refer to Figure 7 for mounting dimensions.
1. Remove the transducer cover using a Phillips head
screwdriver.
2. Select the mounting location.
3. Mount transducer on a vertical surface with two #8 self-tapping
screws (not provided).
4. Pull wires through bottom of enclosure and make necessary
connections.
5. Replace cover and make pneumatic connections.
•Tools (not provided)
- Digital Volt-ohm Meter (DVM)
- Appropriate screwdriver for mounting screws
- Appropriate drill and drill bit for mounting screws
•Appropriate accessories
•Two #8 self-tapping mounting screws (not provided)
•Training: Installer must be a qualified, experienced technician
Wiring Use maximum 12 AWG wire for wiring terminals. Refer to Figures
1, 2, 3, & 4for wiring information and Figures 5 & 6for switch
designations.
(Wiring Instructions continued on pages 2 and 3.)
RoHS
RoHS
RoHS
ORDERING INFORMATION

Model PR-276
Technical Information
TI.276-03
DUCT PRESSURE TRANSDUCER
Page 2 of 4
PR-276 Duct Pressure Transducer with mA Output
TYPICAL APPLICATIONS (wiring diagrams)
PR-276 pressure transducers with VDC output are field selectable 0–5 VDC or
0–10 VDC output and can be powered with either a 12–40 VDC or 12–35 VAC.
The following describes the proper wiring of these pressure transducers with
VDC output:
Wiring PR-276 Units with VDC Output
1. Remove the terminal block by carefully pulling it off the circuit board.
2. Locate the [+], [-] and [0] terminal markings on the board.
3. Attach the power wires to the [+] and [-] terminals. The [-] terminal is also
the negative output terminal.
4. Connect the [0] terminal, which is the positive VDC output terminal, to the
controller’s input terminal.
5. Re-insert the terminal block to the circuit board and apply power to the unit.
6. Check the appropriate VDC output using a voltmeter set on DC volts across
the [0] and [-] terminals.
PR-276 pressure transducers with 4–20 mA output units are powered with a
12–40 VDC supply.
The following describes the proper wiring of these pressure transducers with
mA output:
Wiring PR-276 Units with mA Output
1. Remove the terminal block by carefully pulling it off the circuit board.
2. Locate the [+] and [-] terminal markings on the board.
3. Attach the supply voltage to the [+] lead.
4. Connect the 4–20 mA output ([-] terminal) to the controller’s input terminal.
5. Ensure that the power supply common is attached to the common bus of
the controller.
6. Re-insert the terminal block to the circuit board and apply power to the unit.
7. Check for the appropriate output signal using a DVM set on DC milliamps
connected in series with the [-] terminal.
PR-276 Duct Pressure Transducer with VDC Output
TYPICAL APPLICATIONS (wiring diagrams)
Input Signal
+Common
+ +
Shield/Ground
Controller / Meter / Recorder
mA Output Transducer Only 12–40 VDC Power Supply
Input Signal
+Common +
Shield/Ground
Controller / Meter / Recorder
mA Output Transducer Only
Figures 1 & 2 illustrate typical wiring diagrams for the PR-276 Series,
4–20 mA, two- wire output duct pressure transducers.
Figure 1 – Wiring for mA Output Duct Pressure Transducers with External DC
Power Supply
Figure 2 – Wiring for mA Output Duct Pressure Transducers where Controller or
Meter has Internal DC Power Supply
Figures 3 & 4 illustrate typical wiring diagrams for the PR-276,
0–5/0–10 VDC output duct pressure transducers.
Figure 3 – Wiring for VDC Output Duct Pressure Transducers when applied
with External AC Supply
Signal
+
Common
Supply Neutral Hot
O
Input Signal
+Common
+
Shield/Ground
Controller / Meter / Recorder
VDC Output Transducer Only 12–35 VAC Transformer
Figure 4 – Wiring for VDC Output Duct Pressure Transducers when applied
with External DC Power Supply
S1 S2 Zu
Zb
S
+0
S3
ON
ON ON
MAMAC 9248
Zu
S
MAMAC 9248
S1 S2
ON
ON
Zu
Zb S
Zu
S
Signal
+
Common
Supply
O
Input Signal
+Common
+
Shield/Ground
Controller / Meter / Recorder
VDC Output Transducer Only 12–40 VDC Power Supply
Input Signal
Common
RoHS
RoHS RoHS
O N
O N
O N
O N
O N
O N
O N
O N
O N
O N
O N
O N O N
O N
Caution:
Caution:
If you are using grounded AC, the hot wire must be on the [+] terminal. Also, if you are using a controller without built-in isolation, use an isolation
transformer to supply the PR-276 transducer.
Caution:
Caution:
This product contains a half-wave rectifier power supply and must not be powered off transformers used to power other devices utilizing non-isolated
full-wave rectifier power supplies.
Caution:
Caution:
When multiple PR-276 units are powered from the same transformer, damage will result unless all 24G power leads are connected to the same
power lead on all devices. It is mandatory that correct phasing be maintained when powering more than one device from a single transducer.
mandatory that correct phasing be maintained when powering more than one device from a single transducer.

Model PR-276
Technical Information
TI.276-03
DUCT PRESSURE TRANSDUCER
Page 3 of 4
VDC Output
mA Output
S1
+ -
Zu S
ON
1
2
RoHS
RoHS
RoHS
Figure 5 – Range Configurations for Pressure Transducers with mA Outputs
Figure 6 – Range Configurations for Pressure Transducers with VDC Outputs
R10 / R12 0 – 5.0 "wc / 1250 pa (default)
0 – 2.5 "wc / 625 pa
0 – 1.25 "wc / 312.5 pa
R11 / R13 0 – 15.0 "wc / 3750 pa (default)
0 – 7.5 "wc / 1875 pa
0 – 3.75 "wc / 937.5 pa
R10 / R12 0 – 5.0 "wc / 1250 pa (default)
0 – 2.5 "wc / 625 pa
0 – 1.25 "wc / 312.5 pa
R11 / R13 0 – 15.0 "wc / 3750 pa (default)
0 – 7.5 "wc / 1875 pa
0 – 3.75 "wc / 937.5 pa
12
O N
O N
12
O N
O N
12
O N
O N
12
O N
O N
12
O N
O N
12
O N
O N
12
O N
O N
12
O N
O N
12
O N
O N
12
O N
O N
12
O N
O N
12
O N
O N
0 – 10 VDC (default)
0 – 5 VDC
12
O N
O N
12
O N
O N
Range Configuration: Switch 1 (S1)
Range Configuration: Switch 1 (S1)
Output Configuration: Switch 3 (S3)
Switch 2 (S2)
Factory Sealed
Switch 2 (S2)
Factory Sealed
S1
S3
+ - 0
Zu S
ut
pu
t
S
S
S
S
S
3
3
3
3
3
3
3
+ - 0
ON
1
2
ON
1
2
Caution:
Caution:
Caution:

Model PR-276
Technical Information
TI.276-03
DUCT PRESSURE TRANSDUCER
Page 4 of 4
CHECKOUT DIMENSIONAL DATA
CALIBRATION
1. Verify that the unit is mounted in the correct position.
2. Verify appropriate input signal and supply voltage.
3. Verify appropriate configuration range.
CAUTION: Never connect 120 VAC to these transducers.
Never connect AC voltage to a unit intended for DC supply.
Transducer
Operation This is a rough functional check only.
1. Adjust the pressure to obtain maximum output signal for
appropriate range.
2. Output should be 20 mA or 5 or 10 VDC.
3. Adjust the pressure to obtain minimum output signal.
4. Output should be 4 mA or 0 VDC.
Calibration of PR-276 mA Units
1. Connect terminals [+] and [-] to the appropriate power
source.
2. Connect the DVM in series on the [-] terminal.
3. Apply low pressure to the unit and carefully adjust the zero
trimmer [Zu] to obtain desired low output.
4. Apply high pressure to the unit and adjust span trimmer [S]
to obtain the desired high output pressure.
5. Repeat steps 3 and 4 until desired calibration is achieved.
All units are factory calibrated to meet or exceed published
specifications. If field adjustment is necessary, follow the
instructions below.
MAINTENANCE
Regular maintenance of the total system is recommended to
assure sustained optimum performance.
FIELD REPAIR
None. Replace with a functional unit.
WARRANTY
See Data Sheet for additional information.
Calibration of PR-276 VDC Units
1. Connect terminals [+] and [-] to the appropriate power
source. The [-] terminal is also the negative output terminal.
2. Connect the DVM on DC volts across [0] and [-] terminal.
3. Apply low pressure to the unit and carefully adjust the zero
trimmer [Zu] to obtain desired low output.
4. Apply high pressure to the unit and adjust span trimmer [S]
to obtain the desired high output pressure.
5. Repeat steps 3 and 4 until desired calibration is achieved.
Figure 7 – PR-276 Duct Pressure Transducer Dimensions shown in inches and
millimeters (mm).
For Technical / Application Assistance call your nearest office
8189 Century Boulevard • Minneapolis, MN 55317-8002 • USA
800-843-5116 • 952-556-4900 • Fax [phone]
[email protected] • www.mamacsys.com
EUROPE
Baird House, Units 6 & 7
Dudley Innovation Centre
Pensnett Estate • Kingswinford
West Midlands • DY6 8XZ
United Kingdom
01384-271113 • Fax [phone]
AUSTRALIA
4Arminger Court, Unit 2
Holden Hill • S.A. 5088
Australia
08-8395-4333 • Fax [phone]
CANADA
155 McIntosh Drive, Unit 5
Markham • Ontario • L3R 0N6
Canada
905-474-9215 • Fax [phone]
ASIA
No. 22 Lorong 21AGeylang #11-02
Prosper Industrial Building
Singapore • 388421
656-3927273 • Fax [phone]
MAMAC Systems, Inc., reserves the right to change any specifications without
notice to improve performance, reliability, or function of our products.
NOTE: The PR-276 is a highly accurate device. For
applications requiring a high degree of accuracy, the use of
laboratory quality meters and gauges are recommended.
TI.276-03
RoHS
RoHS
RoHS